types-kit.withindexsignature.md

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WithIndexSignature type

Create a type that contains T, and uses the IndexSignatureType type as the index signature.

Signature:

export type WithIndexSignature<T, IndexSignatureType> = Record<
  PropertyKey,
  IndexSignatureType
> &
  T

Example

 interface Props {
    a: number
    b: number
 }
 // ExpectMatch: { a:number, b:number, [key: PropertyKey]: any }
 type NewProps = WithIndexSignature<Props, string>